Hardened skin care instrument



FIG. 1 is a front top and right side perspective view of a hardened skin care instrument showing my new design;

FIGS. 2 and 3 are, respectively, front and rear elevational views thereof;

FIGS. 4 and 5 are, respectively, left and right side elevational views thereof; and,

FIGS. 6 and 7 are, respectively, top plan and bottom plan views thereof. 

The ornamental design for a hardened skin care instrument, as shown and described. 